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<title>Set the UID of the current process</title>
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<h1 class="refname">posix_setuid</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">posix_setuid</span> — <span class="dc-title">Set the UID of the current process</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.posix-setuid-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>posix_setuid</strong></span>
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$uid</code></span>
)</div>
<p class="para rdfs-comment">
Set the real user ID of the current process. This is a privileged
function that needs appropriate privileges (usually root) on
the system to be able to perform this function.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.posix-setuid-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">uid</code></em></span>
<dd>
<p class="para">
The user id.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.posix-setuid-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.posix-setuid-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-3670">
<p><strong>Example #1 <span class="function"><strong>posix_setuid()</strong></span> example</strong></p>
<div class="example-contents"><p>This example will show the current user id and then set
it to a different value.</p></div>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">posix_getuid</span><span style="color: #007700">().</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">; </span><span style="color: #FF8000">//10001<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">posix_geteuid</span><span style="color: #007700">().</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">; </span><span style="color: #FF8000">//10001<br /></span><span style="color: #0000BB">posix_setuid</span><span style="color: #007700">(</span><span style="color: #0000BB">10000</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">posix_getuid</span><span style="color: #007700">().</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">; </span><span style="color: #FF8000">//10000<br /></span><span style="color: #007700">echo </span><span style="color: #0000BB">posix_geteuid</span><span style="color: #007700">().</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">; </span><span style="color: #FF8000">//10000<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.posix-setuid-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.posix-setgid.html" class="function" rel="rdfs-seeAlso">posix_setgid()</a> - Set the GID of the current process</span></li>
<li class="member"> <span class="function"><a href="function.posix-seteuid.html" class="function" rel="rdfs-seeAlso">posix_seteuid()</a> - Set the effective UID of the current process</span></li>
<li class="member"> <span class="function"><a href="function.posix-getuid.html" class="function" rel="rdfs-seeAlso">posix_getuid()</a> - Return the real user ID of the current process</span></li>
<li class="member"> <span class="function"><a href="function.posix-geteuid.html" class="function" rel="rdfs-seeAlso">posix_geteuid()</a> - Return the effective user ID of the current process</span></li>
</ul>
</p>
</div>
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